The city of Glendale provides the following information as a resource to citizens in dealing with feral cat issues. The city of Glendale does not handle feral cat colonies, however, Maricopa County does offer some resources to residents in dealing with feral cats.

Information from Maricopa County Animal Control and Care (MCACC):

In examining effective feral cat reduction/elimination programs across the country,
MCACC has concluded that the most effective
solution is a comprehensive program that includes:

Community education about spay/neuter
and keeping tame cats indoors.

Adoption of tame strays into new homes.

Trap, Neuter, Return (TNR) to managed
colonies for feral cats.
Through TNR, cats are humanely trapped and
sterilized. Feral, therefore unadoptable, cats are
placed back into the environment in which they
were living. Volunteer caretakers then provide food,
water, and clean, unobtrusive shelters for the cats.
Eventually, through natural attrition, the colony dies
out. Any stray or tame, adoptable cats found in the
colony are removed and adopted into homes.

A stray cat is an unowned animal that you see in
your neighborhood that is friendly and enjoys
human contact.

A feral cat has had little or no
human contact during its natural life.
Some people consider feral cats to be nuisances
because they can exhibit behavior such as marking
their territory, howling at night, fighting, and
destroying property. Because feral cats are usually
not spayed or neutered, they reproduce at an
alarming rate, which results in more cat problems
and public health concerns.